Effects of Modified Ezpanded Perlite Aggregate and Air Entraining Agent on Properties of Polymer Modified Lightweight Thermal Insulation Mortars
Expanded vitrified perlite (EVP) and hydrophobic expanded perlite (HEP) as lightweight aggregate and air entraining agent (AE) were added into mortar to decrease its thermal conductivity. Mixture of powder polymer additive (MPPA) includes redispersible polyethylene vinyl acetate (VAc/E), methyl cellulose (MC) and starch ether (ST) were used as organic binding agent as well as water retention and consistency controlling agent. The results show that the bulk density, thermal conductivity, mechanical properties, dry shrinkage ratio of mortars all decrease with the increase of the mass ratio of aggregate to cement (mA/mC); and the higher consistency, lower bulk density and thermal conductivity, and reduced dry shrinkage ratio can also be observed by adding AE in mortar at the constant water/cement-ratio, however, worsened mechanical properties of mortar are also observed at the same time.
ezpanded vitrified perlite Hydrophobic-ezpanded perlite thermal conductivity air entraining agent
Xingguo Yue Peiming Wang Guofang Zhang
Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, Institute of Cement-Based Material, School of Materials Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
国际会议
6th Asian Symposium on Polymers in Concrete(第六届亚洲聚合物混凝土国际会议)
上海
英文
53-58
2009-10-29（万方平台首次上网日期，不代表论文的发表时间）